Signaling system



Nov. 24, 1931. A. c. FINNEY SIGNALING SYSTEM Filed Feb. 25, 1927 gya 3&-

Inventor:

Alfred C. Fi nne N D S T .ALFREDC. FINNEY, or UPPER DARBY, PENNSYLVANI ess eivon TO GENERAL m 1 Q 1 ELECTRIOCOMPANY, ACORPORATIOLI F NEW YORKu i $5 vision is made for ananswer-back signal.

Patented Nov. 24, 1931 sIGiIALmG svs'rnlvr Application filedFehniai-y 23, 19 2 7. Serial it' 176:201.

, My invention relates tosignaling systems and has for its object the rovision of a simple and reliable system 0 signaling between two remotely located stations, in which pro- My invention has particular application in electric power stations and systems in the transmission of orders from a control or p transmitting station to aiemotely located engine roomconstitu'ting a receiving station. I

In carrying out my invention in one form I provide an indicating devicein each station which may be'operated by a control device 1n M each station. Each control device. is provided with means associated therewith so that when it is operated to give a signal the other con-. 7

trol'device is renderedinoperative. "In the operation of the system, when the transm tting operator has given a signal, thereceivtrol device to starting position whichlreiconing operator moves his control device as if to. repeatthe signal which disconnects the transmitting control device whereupon the indicators return to zero. The transmitting operator upon observing this returns his connects the receiving control device, and the re ceiving operator then repeats the signal to show'that it has been correctly received. I

also provide a visible or audible alarm deice Whereby one operator may attract the at- 1,4,0 devices 10 and 11 placed in the sending and receiving stations respectively. The indicating devices are suitable electrical instruments, and in the arrangement shown are voltage responsive instruments, such. as. volt meters.

In order to control the indicators two' poten-i tial rheostats 12 and 13 are provided at the sending and receiving stations respectively, these rheostats being each electrically connected by conductors 14*and 15 across a suit-' able electrical source of supply 16. The rheostats 12 and 13 are each provided with a numher or taps leading to contacts with which cooperate arms 17 and 18 respectively; Associated with the contact" arm 17 .is'a 'r 1ay 17 whereby when the contact arm is moved to oii position as shown in the drawing,- the bridging contact ismoved against the: force .of'the spring22 to -;eng'age the contacts 21 and establish a circuitfro'rn one totheother. A similar switchingfdevice 24 is provided-in connection with the'contact arm 18, the constr iction and operationof which will be understoodfrom the previousdescription ofthe device associated withthe contact arm 17.,

Each indicator is connected'through a concluctor '25 directly to one side ofthe supply source 1 6. The'other terminal ofthe indicator '10is connected'through a conductor,

the pair'of contacts'2l, andthe conductor 26,. h i l to the switch arm 18, In a similar mannerthe other termin alof the indicator 11 is connect.-

Tswitchcomprising a bridging' fontactj 19 which may be'moved between t'w'o" airs of stationary contacts 20 and 21. A sprlng 22 is V 23 is providedin the path of the contact arm ed througha conductor 27, the lower pairlof contacts of the switch 24, and the'conductor f 28, to the switc'harm 17. These two terminals of the'indicators are also connected directlytogether by means of a conductor 29. With these connections it will be observed {that when either contact arm is in off-position, as. shown inthe drawing, a' control, circuit for the indicators is established for the other contact arm, and also it will be observedlthat when either contact arm is moved'from' offposition to operate the indicators the control circuit for the other contact arm.- is thereby broken. The contact arm 17 isbiased toward the oii-position, as shown'in the drawinggby means of a spring 17? so that when the contact arm is released by the operator it'will be immediately returned by the' spring to the; 7

oil. position. v V v p ,7

Suitable'alarm devices, shown as bells, 30 and 31 are provided at thesending andjreceiving stations respectively, whereby the at tention of the operators'mayybedirectedto the indicators. The bell 30 has one terminal connected to one side of the supply circuit 16 and its other terminal connected through ing station. 7 With these connections for the alarm devices, it will be observed that when both contact arms are in off-position, as shown in the drawing, the alarm devices are not operated. Whenthecontact arm 17, however, is

moved to operate the indicators a circuit for the alarm 31 in'the receiving station is closed the b-ridgingcontact engagingthe pair v 56 contacts20,-and in ajsimilar manner when thecontact arm 18is moved from Oiflposition a circuit for-the bell is closed by thelojridgg deViGQ 0 theswitch 24 through the upper P ir ofcontactsi, i I V In theoperationof the system the operator at the transmitting stationmoves the arm17 toproduce the desired indication on'the-indicator 10, the same indication 'being produced by the indicator 11 This, at the same time, causes the alarm 31'to operateand also lights the'lamp 35 to attract thefattentionofthe oper ator -in' the receiving station who upon observing the signal moves his contact arm 1'8from off-positionas if to repeat the signal; This causes the switch 24 to open the circuit for the indicators whereby'the indica tors immediately return to zero. At the same time, thealarm 30 is sounded in thetransmitting station to indicate to the sending operator that the receiving operator is repeating the signal. The operator inthe transmitting station thereupon returns his contact arm 17 to: off-position or releases it to allow the spring-17 to return ity to off-position. This closes a control circuit forthe contact arm 18 through the contacts QLWhereupon the re ceiving} operator moves the contact arm 18 to "repeat the signal he has received which is shown on the twodevices 1O andll whereby the sending operator can he assured, that it has been received correctly; The receiving v operator then returns his contact arm 18 back to the off-position, as shown in the drawing,

so that'the system is then ready for the transmission of another signal by the transmitting operator, when desired. r While I have described my invention as embodied-1n concrete form and as operating inaspecifiomanner in accordance ,withthe provisions of the patent statutes, it should be understood thatI do not. limit my invention theretosince various modifications thereofwill suggest themselves to those skilled in the artwithout. departing from thespirit of my invention the scope of which is set forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the United States, is 1. A signaling system comprising sending and receiving stations, electrical indicating devices in said stations, a; control .devicein V eachof said stations for said indicators, each 'control device being provided with an off po sitionand With a plurality of controlling positions, electrical connections between said control devices and said indicators whereby each of said control devices actuates both of said indicators when'either is moved from its'ofl position and each control device being provided withmeans associated with said electrical connections to. efiect ia graduated control of said indicatorswhensaid control deviceisv moved .to its controlling positions, and means operated by each control device for disconnecting the'other control device.

i signaling system comprisinglsend- 7 ing and receiving stations, an indicating device in each of. said stations, a transmitting control device in said sending stationpfor said indicators, a receiving control device in said receiving station for said indicators, each control devicelbein g provided with an oflposition and with a plurality of controlling positions, normally open-switches cooperat ing with said control devices so as to be held closed when saiddevices are in'their ofi positions, electrical connections between said control devices and said indicators so that both of said indicators are actuated when either 1 control device is actuated from its off position and each control device being provided with meansassociated with said electrical connec- I tionsto effect, a graduated-control of said indicators when said control device is moved L to its'controllingpositions and said electrical connections ncluding a connection through said switches sothat'wheneither control de-' vice is operated from its ofl p ositionto effect acontrol of. said indicators, its associated switch is opened to render'the other control device inoperative to eflecta graduated control of said indicators.

3. A signaling system comprising sending and receivingstations, electrical indicating devices in said stations, resistances in said 1 stations, a contact control device 1n each of saidstations, each of said contact devices being provided with an off-position and with a plurality of positions gradually changing the value of said resistanceas the device is moved from elf-position, electrical connections whereby each of said control devices actuates both of saidindicators wheneither ismoved from off-position, and means cooperating, with each of said control devices when in ofi-position for closing a normally open circuitfor the other control device. a w 4. A signaling system comprising sending and receiving stations, electrical, indicating devices in said stations, control devices in said stations for said indicators, each of said control devices being provided with an off position, and normally open switches maintained closed by said control devices respec tively when in said ofl positions, the switch operated by one control device being in the circuit of the other control device so that when either control device is moved from its off position to operate the indicators the control circuit for the other control device, is interrupted. V p

5. A signaling system comprising sending and receiving stations, electrical indicating devices in said stations, control devices in said stations 'for said indicators, each of said control devices being provided with an off position, normally closed switches main tained open by said control devices respec- 'tively when in off position, an alarm in said sending stationin circuit with the switch in said receiving station and an alarm in said receiving station in circuit with the switchin said sending stationso that when the control device in either station is moved from its off position the switch in that station is closed to cause the alarm'in the otherstation only to give a signal.

6. A signaling system comprising sending g and receiving stations, an indicator in each of said stations, a supply source, resistances ,7 1n sa1d sending and receiving stations, con-V nectlons whereby each of sa1d resistances 1s connected across said supply source, taps on said resistances, contact arms cooperating with said taps, normally open switches cooperating with said contact arms so as to be held closed by said contact arms whenin ofl position, connections between one terminal of each of said indicators and one side of said supply source, connections between the other terminals of said indicators and connectionsv between the other terminals of said indicators and said contact arms, said latter connections including a connection through the switch in said sending station to the contact arm in said receiving station and a connection through the switch 1n sa1d recelvingstatlonto the contact arm in sa1d sending station.

In Witness whereof, I have hereunto set' i my hand this eighteenth day of February,

V ALFRED C. FINNEY. 

